Attachment plug receptacle



May 8, 1934. G. s. ELLIOTT 1,957,582

ATTACHMENT PLUG RECEPTACLE Filed March 14. 1930 "Fig-7 )581:1'910. 15' l5 l5' do INVENTOR may .Patented May 8, 1934 STATES ATNT FFICE 2 Claims.

Vl() pliance such as an electric clock or radio may be constantly connected to a source of electrical .energy and a lamp or other appliance connected in a circuit controlled by a switch.

These and other objects of my invention will become more apparent from a consideration of the accompanying drawing in which like reference characters designate like parts and in which Fig. l is a top plan view of a multiple plug receptacle embodying the principles of my invention; Fig, 2 a similar View oi a single plug receptacle; Fig, 3 and Fig. 4 top plan views oi base receptacles of modified form; Figs. 5, 6, '7 and 3 are views diagrammatically illustrating bus bars and terminals of the receptacles shown in Figs. 1 to 4 respectively; Figs. 9 and l() are side and end elevational views respectively oi a common form of attachment plug; Figure 1l, a bottom plan View ci a multiple plug receptacle; and, Figure 12 a bottom plan View of a single plug receptacle.

Referring to Figs. l and 5 of the drawing, 1 designates a base receptacle having electrical contacts 2, 2 and 3, 3', Fig. 5, which are electrically connected to bus bars mounted in an insulating body 1, The terminals are accessible for electrical contact with jacks 4, Figs. 9 and 10. of an attachment plug 5 through slotted apertures 6, 6 and '7, 'l'. The apertures 6, 6 register with bus bar contacts 2, 2' and 7, 7 with 3, 3 and may be of T-shape to receive plug jacks having parallel faces or with their faces arranged in tandem. The receptacles l are provided with the usual fastening lug straps 8 having screw slots 9 for anchoring the receptacles.

As diagrammatically illustrated in Fig. 5 of the drawing, contacts 2 and 3 are connected by a common bus bar 2a to a power terminal 10 and the contacts 2 and 3 are respectively connected by bus bars 12 and 13 to power terminals 11 and 11a. Terminal 10 is adapted for electrical connection to one side of a power line and terminal 11 to the other side of the line. Terminal 11d is connected to the same side of the line as terminal 11 through a switch (not shown) which is disposed between terminal 11a and its connection to the power line. When the plug jacks 4 Cil ,l

are attached to contacts 2, 2', they are connected to the power line through switch terminals and 11a, and when attached to contacts 3, 3, they are connected to the line across the terminals 10 and 11. Thus in the multiple plug re- 60 ceptacle shown in Figs. 1 and 5, one plug may be attached across the power line and another across the switch terminal which may be connected or disconnected as desired. In other words, bus bar contacts 2', 3, oi bus bars 12 and 13 are common i.65 to the polarized bus bar 2a and its contacts 2 and 3 whereby electrical connections may be eiiected from the polarized bus bar to either a constant connection with the power line or through a switch connection with the power line, as for T example, when a light is connected to the switch terminal lla and an electrical clock through the constant connected terminal 1l of the bus bar 13.

In Figures 2 and 6 of the drawing, the same connections are employed in a single plug recep- V tacle in which a plug may be attached either across the terminals 10 and 11 or terminals 10 and switch terminal lla. The electrical connections referred to above are effected through the bus bars mounted on the under side of the receptacle T as shown in Figures 1l and 12. In the multiple receptacle of Figure 1l, bus bars 20, 2l and 22, connect terminals 6a, 7a, 6a and 7a', respectively, the bus bars being provided with terminal connections 23, 24 and 25, by means of which they 85 are connected in the circuit. The terminals or electrical contacts 6a, 7a, 6d and 7a', correspond respectively to the recesses 6, 7, and 6', 7', shown in Figure 1 of the drawing, rIhe screw terminals 23, 24 and 25 correspond to terminals 11a, 11 and i90 10, respectively. In other words, the terminal l0 of Figure 5 is terminal 23 of Figure 11 which, through bus bar 22, electrically connects terminals 6a and 7a or the multiple outlet structure.

In Figure 12, bus bars 26 and 27 and terminal95 screws 28, 29 and 30 establish connections of the bus bar 26 with either one of the terminals 28 or 29 in the same manner as illustrated in Figure 6 of the drawing.

In Figures 3 and 4, the same electrical connec-fV 100 tions may be provided by utilizing six contacts in stead or" eight and for this purpose the slotted apertures are arranged in substantially rectangular form with two of the apertures 15 communicating with a common terminal 15' and two aper# 105 tures 16 and 17 registering with terminals 16 and 17. Terminals 16' are connected by a common bus bar 16a with the switch terminal 11a. Terminals 15 are connected to power terminal 10 by bus bar 15a, terminals 16 to switch terminal lla 110 by bus bar 16a and terminals 17 to power terminal 11 by bus bar 17a.

By inserting jacks 4 of the terminal in apertures 15 and 17, they are connected across the line and by inserting them in apertures 15 and 16 they are connected across terminal 10 and switch terminal 11a.

The single plug base receptacle shown in Figs. 4 and 8 is electrically connected in the same manner as the receptacle of Fig. 3.

It will be evident from the foregoing description of this invention that a base receptacle having two bus bars and terminals common to a polarized bus bar and terminal provides dual control of electrical current at a common outlet and is especially applicable to the multifarious uses of the home.

Although several embodiments of the invention have been herein illustrated and described yit will be obvious to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I claim:

1. An attachment plug receptacle comprising an insulating body having pairs of oppositely disposed base terminal recesses angularly spaced about a common axis, each pair of recesses being adapted to receive the terminals of an attachment plug in such manner that one pair of recesses is inaccessible when the other pair is in engagement with said plug, electrical contact terminals in register with the recesses, a common bus bar connected to one of each of the terminals of said pairs of recesses, and separate bus bars connected to the cooperating terminal of each of said pairs.

2. An attachment plug receptacle comprising an insulating body having oppositely disposed spaced terminal recesses constituting a double -outlet structure for receiving the terminals of a pair of attachment plugs, electrical contact terminals in register with the recesses, and bus bars connecting said terminals, said bus bars being common to both outlet structures, one of said bus bars being connected to the terminals of two recesses offeach of said double outlet structures, and

the other bus bars being each connected to the terminals of one recess of each of said double outlet structures.

GEORGE S. ELLIOTT. 

